package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * @ClassNameAutoFillAspect
 * @Description TODO
 * @Author钰玟
 * @Date2025/2/13 下午12:34
 * @Version 1.0
 **/
@Aspect
@Slf4j
@Component
public class AutoFillAspect {
    /*
    * 切入点
    * */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void pointcut() {}
    /*
    * 前置通知
    * */

    @Before("pointcut()")
    public void before(JoinPoint joinPoint) {
        log.info("开始进行公共字段的填充...");
        //获取被拦截方法注解 对应的 方法类型 是UPDATE 还是 INSERT
        MethodSignature signature = (MethodSignature)joinPoint.getSignature(); //获取方法签名
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class); //获取注解
        OperationType operationType = annotation.value();//获得数据库操作类型
        //被拦截的方法参数的实体对象
        Object[] args = joinPoint.getArgs();
        if(args == null || args.length == 0) {
            return;
        }
        Object entity = args[0];

        //获取 赋值的数据
        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();

        //根据操作类型的不同 进行不同的填充操作
        if(operationType == OperationType.INSERT) {
//            进行4个字段的填充操作
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME , LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER , Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME , LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER , Long.class);
                setCreateUser.invoke(entity, currentId);
                setCreateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
                setUpdateTime.invoke(entity, now);

            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        if(operationType == OperationType.UPDATE) {
            //进行2个字段的填充操作
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER , Long.class);
                setUpdateTime.invoke(entity, now);
                setUpdateUser.invoke(entity, currentId);
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }

    }
}
